nice_bgm

题目描述：我拿出自己的私密音乐来和你分享，一起享受快乐吧
题目环境：https://download.csdn.net/download/m0_59188912/87097729

1. private bit隐写，直接用python脚本跑。
   脚本源码：
   import re
   import binascii
   n = 235986
   result = ‘’
   fina = ‘’
   number = 0
   list = [0,1,26,50,75,99,124,148,173,197,222,246,271,295,320,344,369,393,418]
   file = open(‘cb1bc8789569146483da7bd65ee4a063.mp3’,‘rb’)
   while n < 1369844 :
   file.seek(n,0)
   if number in list:
   n += 417
   else:
   n += 418
   file_read_result = file.read(1)
   read_content = bin(ord(file_read_result))[-1]
   result = result + read_content
   number += 1
   #print result

fina = ‘’
textArr = re.findall(‘.{’+str(8)+‘}’, result)
#textArr.append(result[(len(textArr)*8):])
for i in textArr:
fina = fina + chr(int(i,2)).strip(‘\n’)
print fina
运行脚本。

2. 得到flag。
   flag{0k4_YOu_Seem_s0_cl3ver_t0_find_f1ag!}

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